maths=Data Handling Coursework

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Introduction

Data Handling Coursework:

User Car Database

Hypothesis:

The more the mileage of a car the lower the used price of the car. I will use different makes of cars and the choices I have picked are Mercedes, Ford and BMW; however I think that because of my knowledge I know that the Mercedes is a more expensive make of a car and therefore it should have a higher used price than the rest of the cars.

The reason for this hypothesis is that I think that the higher the mileage of a car the lower the used price of the car so if a car has used up a high mileage that would mean that that the quality of the engine for example would be low and that would mean that the used price would much low. I want

The data is there for you, so you don’t need to spend time and collect the data.

Also the data was easy to get

Cons:

The data may be too old and not reliable enough

Also the information could be miss typed or wrong, therefore making it unreliable.

Knowing that the data may be unreliable but because it would spare me time it would be a risk that would be taken. I know that the data would be most probably reliable because one person collected it and even though they could be mistakes it saves me time.

I will use a sample size of fifteen Mercedes, fifteen Fords and fifteen BMW.

This will be a fair sample because I will pick each one at random so that the test will be fair enough, and in contrast I pick

The diagrams will be useful because they let me predict future results and also help me set out my data easily, and this will be useful because I can see my data easily but also I can see there is a difference in them and they will be easily to compare to.

The results of the calculations will help me compare the Mercedes to the BMW and Ford and also I hope that when I display them I can predict future results but also compare the results to find a viable conclusion.

Related GCSE Gary's (and other) Car Sales essays

The most expensive Vauxhall and Ford car was �7999. The least expensive Ford and Vauxhall were also the same at �850. The median of the Ford cars is slightly higher than Vauxhall cars by �405. The lower quartile of the Ford was �3000 which was lower then the Vauxhall which was at �3045.50.

To make the results as accurate as possible I am going to use all the data in my chart. I am going to display the data in the form of a scatter diagram as this will allow me to draw a line of best fit.

It is only out by 2%. Again, like in hypothesis 1, the equation of the straight line is a basic general equation for the relationship between the age of the car and value of depreciation. My prediction for this hypothesis was correct because there is a general increase in the value of depreciation as the mileage of the car increases.

The bar chart clearly shows that every one who buys a second hand car is most interested in the car being years between 1 to 4. The bar graph also show that 63.333333 percentages of the people likes to buys car between ages 1 to 5.